Question

A boat can go 60 km downstream and 40 km upstream in 12 hours 30 minutes. It can go 84 km downstream and 63 km upstream in 18 hours 54 minutes. What is the speed (In km/h, to the nearest integer) of the boat in still water?

• A. 9
• B. 7
• C. 10
• D. 8

Answer 1

Answer: (A)